package chapter05.Example8;

public class Example08 {
    public static void main(String[] agrs) {
        System.out.println("1 添加-----------------");add();
        System.out.println("2 删除-----------------");remove();
        System.out.println("3 修改-----------------");alter();
    }
    public static void add(){
        StringBuffer sb = new StringBuffer();
        sb.append("itcast");
        System.out.println("append添加结果："+sb);
        sb.insert(2,"123");
        System.out.println("insert添加结果："+sb);
    }
    public static void remove(){
        StringBuffer sb = new StringBuffer("itcastcn");
        sb.delete(1,5);
        System.out.println("删除指定位置结果："+sb);
        sb.deleteCharAt(2);
        System.out.println("删除指定位置结果："+sb);
        sb.delete(0,sb.length());
        System.out.println("清空缓慢冲出结果："+sb);
    }
    public  static void  alter(){
        StringBuffer sb = new StringBuffer("itcastcn");
        sb.setCharAt(1,'p');
        System.out.println("修改指定位置字符："+sb);
        sb.replace(1,3,"qq");
        System.out.println("替换指定位置字符(串)结果："+sb);
        System.out.println("字符串反转结果："+sb.reverse());
    }
}
